Description:Shaquille O'Neal's upcoming DJ gig at a Vegas nightclub isn't a joke. TMZ Sports has learned the NBA star has been secretly training in the art of the turntable for years. We spoke with DJ Irie -- the team DJ for the Miami Heat (who's also appeared with Shaq on "Inside the NBA") and he tells us Shaq has been practicing in private since his playing days. Irie says, "When Shaq was in Miami he actually made a studio in his house. We'd go there and make beats and do mashups.(1:00)